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- Problem 1: Cast out duplicate integers.
-
- The input file will contain integers, two per line, with one
- blank between the two numbers.
-
- The two numbers are to be treated a belonging to two arrays,
- say left and right.
-
- The numbers will be greater than or equal to 0, and less than
- or equal to 32767. There will be fewer than five hundred pairs
- of numbers.
-
- The last record will contain
- -1 -1
-
- Print, one per line, in ascending order, those numbers which appear
- in both the left-array and the right-array. Print a particular
- number only once, even though it may appear in an array more than once.
-
- Example:
-
- 9743 3
- 3 6555
- 21 48
- 3 29
- 19 9743
- -1 -1
-
- For the example, the correct output will be
- 3
- 9743
-